I appreciate the hard work that went into this one but even with the upgrades, I find it too hard.

In all honesty, this isn't derogatory or intended to be, but what aspect of Sushiria is it that some people find difficult? For me, the game's just like any other Gameria in terms of difficulty level, so it's relatively easy. I'm just curious

I gave it a 4/5,, It's fun but as other people mentioned, there weren't a lot of new features and I didn't know half the ingredients (until I realized you could check the ingredients tab, haha) but I still find it fun and I'm in the middle of a playthrough right now